Avaya Dual Loop Buffer Card – Refurbished QPC659E | Enhanced Synchronization for Meridian Systems
CONDITION: RE-MADE IN THE USA™ Refurbished
Part Number: QPC659E
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Product Description
Avaya Dual Loop Buffer Card – Refurbished QPC659E is a critical interface and synchronization module designed for Avaya (formerly Nortel) Meridian Option PBX systems. The QPC659E manages real-time data buffering and timing between control and network modules, ensuring uninterrupted communication and fault tolerance across system loops.
As the latest revision in the QPC659 series, the QPC659E offers enhanced speed, reliability, and loop recovery features over earlier versions (QPC659B and QPC659D). Its dual-loop design provides automatic redundancy — maintaining service continuity even if one control loop fails — making it an essential component in large-scale enterprise and telecom environments.
Each module is professionally refurbished, cleaned, and fully tested to meet OEM performance standards, offering dependable operation and long-term value for legacy Meridian systems.
Features
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Avaya Dual Loop Buffer Card – Refurbished QPC659E
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Compatible with Avaya/Nortel Meridian Option 11C, 61C, and 81C PBX systems
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Provides dual-loop redundancy for continuous uptime and fault tolerance
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Synchronizes data between network and control modules
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Improved performance and stability over earlier QPC659 versions
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Professionally refurbished, cleaned, and certified to OEM standards
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Tested under load for electrical integrity and communication accuracy
Q & A Section
Q: What systems are compatible with the Avaya QPC659E?
A: It’s designed for Avaya/Nortel Meridian Option 11C, 61C, and 81C PBX systems.
Q: What’s the purpose of the Dual Loop Buffer Card?
A: It manages data synchronization and redundancy between control loops, ensuring continuous communication within Meridian systems.
Q: How is the QPC659E different from previous models?
A: The QPC659E features enhanced loop timing, improved reliability, and faster synchronization compared to QPC659B and QPC659D models.
Q: Is this a new or refurbished part?
A: This listing is for a professionally refurbished module, tested and certified to OEM performance standards.
Q: Is installation straightforward?
A: Yes. The card installs directly into compatible Meridian PBX slots — simply power down the system, replace, and restart.